Marilyn Hartman faces felony charges including burglary after a January 2018 incident in which she allegedly got past security, boarded a jet and flew to London’s Heathrow Airport without a ticket.

Marilyn Hartman faces felony charges including burglary after a January 2018 incident in which she allegedly got past security, boarded a jet and flew to London’s Heathrow Airport without a ticket. (Chicago Police Department)

A Cook County judge on Wednesday found a woman known as the “serial stowaway” mentally fit to stand trial and ordered her released on electronic monitoring from the state mental health hospital in Elgin.

The decision by Judge Maura Slattery Boyle comes almost four months after the same judge found Marilyn Hartman unfit and transferred her to the Elgin facility for treatment that included group therapy and medication.

“She was oriented, she was cooperative, there was no agitation,’’ the judge said of recent improvements by Hartman. “She understood the difference between a bench and a jury trial.’’

Hartman’s earlier agitations, including delusions and anti-social behavior, appeared to be in remission, according to Slattery Boyle.

Dr. Matthew Markos, director of the court-sponsored Forensic Clinical Services, also testified Wednesday at the hearing at the Leighton Criminal Court Building that Hartman “was fully cooperative with the entire treatment plan that was formulated for her.”

Markos also noted that Hartman did not make any escape attempts while at the Elgin facility.

The judge allowed Hartman to be released to Safe Haven, a treatment facility in Chicago, but she must wear an ankle monitor.

However, Hartman has been arrested at least once before while on electronic monitoring. She was found at a bus shuttle center at O’Hare International Airport in February 2016 wearing a GPS ankle bracelet that was set to warn officials if she went to an airport.

Hartman, who sat quietly as she stared at the judge while wearing light blue jail garments, was warned by Slattery Boyle to stay away from airports or other transportation centers.

Hartman, 66, faces felony charges including burglary after a January incident in which she allegedly got past security, boarded a jet and flew to London’s Heathrow Airport without a ticket.

After being returned to Chicago, charged and released on bond, Hartman was arrested again — this time after she was spotted at O’Hare International Airport in violation of a court order barring her from the airport.